Pressure cooker and cooler



A. Ki RARIG.

PRESSURE COOKER AND COOLERx FILED AUG30,1922. 9 SHEETSQSHEET l,

L Jnum 1to1,

Maf 20, 1923 A. K. RARIG.

PRESSURE COOKER AND COOLER.

9 SHEETS SHEET 2.

FILED AUGO. 1922.

Mar. 20, 1923., l 1,449,24@

Mal". 20, 1923.

A. K. RARIG. PRESSURE COOKER AND COOLER.

FILED AUG. 30. 1922.

. 31106411 o1, a' ff.

affermati Mal: 20. 1923,

A. K RARIG.

PRESSURE COOKER AND COOLER.

9 SHEETS-SHEET 5.

FILED AUGQ 30, 1922.

PRESSURE COOKER AND COOLER.

FILED AUG.30.1922'. 9 sHETs-sHEET s.

Mal. 20, 1923.

A. K. RARG.

PRESSURE COOKER AND COOLER.

FILED AUG,30,1922.

9 SHEETSSHEET 7A gnou-fom atto? nui 9 SHEET SHEET 8 A. K. RARIG.

PRESSURE COOKER AND COOLER.

FILED AUG.30, 1922.

Mar. 20, 1923.

vMal". 20, i923.

- A. K. RARIG.

PRESSURE COOKER AND COOLER.

9 SHEETS SHEET 9.

FILED AUG. 30. 1922.

mwalfwd Hm-*NE mi@ M /apf ALEXANDER K. RAR/1G, 0F OAKLAND, CALFORNIA.

PRESSURE COOKER AND COLER- Application led August 30, 1922.

T0 aZZ w wm it may concern Be it known that l, mcXANni-:n K. RARIG, a citizen of the United States, residingr at Oakland, in the county of Alameda and State of California, have invented new and `useful Improvements in Pressure Cookers and Coolers. of which the following,r is a specification.

This invention relates to an apparatus for cookingr fruits, meats, vegetables and other sealed canned goods under steam heat and pressure, while the contents of the cans are being properly conducted through. a course of travel and agitated en' transit, and for cooling the cans upon the completion of the cooking Operation and prior to their exit from the apparatus.

In the canning industry the old style open vat (water cook) process has been largely superseded by the pressure process, i. e., the process of cooking the foodstuff already packed in the lcans by steam treatment in a closed cooker, the temperature of the steam varying fromv2l2O to about 2G00 F., according to the degree of heat and time required to cook various kinds 0f food stuffs. Under present conditions two styles of cookers are required to meet the demands. to wit, tlle stationary retort used for -cookingir food (l products that require high temperatures,

2200 to 260D F., and a long time cook, such as fish, shrimp, meat and certain vegetables, as spinach, corn, peas, olives,` etc., and the continuous agitating cooker (with cooler attachment) used for cooking' food products that do not require so much time or a temperature in excess of 2120 1".. such as fruits, berries, tomatoes, soups, sauerkraut, pineapples, tomato paste. etc. lnasmuch neither of these styles of cookers can be used for general purposes, since the stationvary retort cannot be employed to do the work' of the continuous agitatingicooker for short-time, low-temperature cooks, and the continuous agitating cooker cannot be employed to do the work of the stationary retort for long-time, high-temperature cooks, it is necessary for canning establishments equipped with one of these classes of cookers only to shut down in certain seasons, and in order to enable a canning establishment to operate continuously it is necessary to equip it with large numbers of both styles of cookers at great cost of installation and losses due to the. housing` and maintenance of perhaps half of the Serial No. l585,325.

equipment of one kind or the other lidle at certain seasonal periods. In both styles of cookers mentioned a material loss of steam occurs each time doors are opened for inlet and exit of goods, and it is impossible to keep the confined steam pressure and tem` perature constant and uniform. Because of this fact, and on account of the nature of the instrumentalitiesemployed, the cooking period is prolonged, and, particularly in the case of the continuous agitating cookers heretofore employed, the range of. travel of the cans is necessarily quite long and the apparatus consequently occupies considerable floor space and a considerable amount of steam is required to supply the cooking chamber. Such typesof cooking devices, therefore, separately considered, have a limited range of usefulness, and are cumbersome and costly in construction and operation, occupy a large amount of floor space, have a limited out put in proportion to size, and are comparatively wasteful in these respects and uneconomical in operation.

The general object of my invention is to provide ana-pparatus which overcomes these objections to prior cookers, and which. therefore, combines all the workingT advantages without being subject to the disadvantages, of both the stationary retort and the continuous agitatingy cooker heretofore in use, and hence embodies an apparatus adapted for cooking all kinds of food substance at high and low temperature ranges and to operate efficiently at all temperatures between 2120 and 2600 l".,'and to cook the food product for any period required.

A further object of the invention is toi, provide a compact type of apparatus occupyinb) a comparatively small amount of Hoor space. which embodies means for holdint` a maximum number of cans within a heating chamberI of comparatively small dimensions and for sealing said chamber against the escape of steam at all times, thereby preventing waste of steam and enabling" temperatures and pressures to be accurately and uniformly governed and maintained, and 'which provides for governingthe range of travel of the sans Yto suit any cooking' period required.

Still further objects of the invention are to provide a machine for general use which is strong, durable and comparatively inexpensive of construction, which is practically automatic'and highly economical in oper-v ation, which is positive, certain and reliable in action, which may be employed for,k

' from.

. With these and other objects in View, which will appear in the course of the subjoined description, the invention consists of the features 0f construction, combination and arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a front elevation of a pressure cooker and cooler constructed in accordance with my invention.

Figure 2l is a sectional plan view thereof taken substantially. on line 2-2 of Figure 4.

Figure 3 is a side elevation, with parts broken away and in sect-ion, of the forward portion of the cooker and parts of the operating mechanism adjacent thereto.

Figure 4 is a Vertical transverse section through the cooking drum, some of the cans appearing in shaded lines to illustrate their shifting action.

Figure 5 is a fragmentary interior view of the cooking drum, looking toward lthe fixed shifter tracks, showing diagrammatically in dotted lines the movements of the' cans in being shifted thereby.

Figures 6 and 7 are detail views illustrating working portions of the rotary drum actuating dog and drum actuating wheel.

Figure 8 is a top plan view of the rotary dog.

Figure 9 is a view of the mutilated gears for periodically rotatingy and reversing the rotary and reciprocatory can injectors and ejectors.

Figures 10, 11, 12 and 13 are 'plan views of a portion of the can feed devices, showing the successive steps of operation thereof.

Figures 14, 15 and 16 are views of the cam mechanism for oscillating the can feed fingers, showing the cam in different working positions.

Figures 17, 18,19 and 20 are views of the cam for reciprocating the said can feed fingers, showing such cam in different working positions. l

Figure 21 is a detail section showing the mounting of one of the cranks for oscillating the can feed rods or shafts.

Figure 22 is a longitudinal section through one of the feed or discharge port governing valves and the associated caninjector or ejector.

Figure 23 is a transverse section thereof on .line 23-23 of Figure 22. v

Figure 24 is a detail section through the partition head of an injector br ejector valve on an enlarged scale.

' Figure 25 is a view looking toward one side of said partition head. l

Figure 26v is a cross-section' through one journal `of an injector or ejector valve, showing the valve in side elevation.

Figure 27 is a fragmentary side elevation ylooking toward the inner side of an injector or ejector valve casing.

Figure 28 is a section thro-ugh the drum and a side elevation 'of the sectional helical track shifter omitted from the main views forclarity of illustration.

' the fixed helical can shifter and illustrating diagrammatically the arrangement of the sectional adjustable helical shifter track sections about the drum and with relation to said fixed shifter.

Figure 30 is a detail transverse-section through the cooking drum showing adjacent ends of two adjustable helical shifter track sections with one of said vsections adjusted for can shifting action. y

Figure 31 is a sectional elevation taken substantially on line 31-31 of Figure v30.

Figure 32 is a .detail section on line 32--32 of Figure 30.

Figure 33 is a detail sectionon line 33- 33 of Figure 30.

Figure 34 is a detail section through the cooking drum and two adjacent can retainers showing capability of retainers for hold-- ing large and small cans.

Figure 35 .is al sectional substantially on line 35-35 of Figure 34.

Figure 36 is a ldiagram showing arrangement of the heating coil within the cooking drum.

Figure 37 is a detail view of one of the cooler pipes. l v

Figure 38 is a v'ertica.l-frontto-rear section on a reduced scale through` the cooler, showing the cooling means, other partsy beingl omitted.

Figure 39 is a vertical transverse section of the same. y

In the illustrated embodiment of my i n. vention herein disclosed, A and A designate cooking `and cooling devices arranged one in advance ofthe other and each. comprising a drum or cylinder 1 having a rear wall 2, detachably secured in position, as by bolts elevation taken ."i

or other fastening means 3, to permit of bearings 6 on the front and rear walls or heads of the drums, and each bearing d j is provided with a flange plate 7 secured to the drum wall and with a stuffing box b with which is associated a` movable gland or follower 9. The box 8 is formed with notched guide lugs 10, and bolts 11 engage the notches in said lugs and have threaded ends passing through the plate 7 and follower 9 and provided with fastening and adjusting nuts l2. These stufling boxes seal the journals against the escape of steam therethrough and adjustment of the nuts the glands and packings may be` tightened up whenever needed. A hand-hole 13 is provided in each of said cylinder walls to allow access to the internal parts of the packing. which hand-hole is normally closed by a cover plate 14.

Mounted upon the periphery of eaCh'c-arrier wheel are can retainers 15--15.` each comprising a channeled or troughshaped resilient sheet-metal body extending from side to side of the'wheel, said body being closed at its inner side and open at its outer side and each end.' At their closed sides the retainers are suitably fastened to the wheel, as by'bolts or rivets 16, the sides of the retainer being free to receive and more or less yieldingly embrace the cans 17 entered therein. In cross-section each retainer is U-shaped or of more or less elliptical form, extending on an arc somewhat greater than a half-circle, its open outer side being oontracted to less than the diameter of the smallest-sized can to be treated in the machine. This form of retainer provides for the reception of cans of two 0r more differ'` ent sizes (diameters), as shown in full and dotted lines in Figure 34, and at the same time allows the cans held therein to be slid endwise or longitudinally along the retainers. across the periphery of the carrier wheel. without liability of clogging or binding. The shape of the retainer, in any event, is such as to not completely enclose the -can but to permit it to projectl partially beyond the open side of the retainer, for a purpose presently described. The retainers on the carrier wheels of the cooker andy cooler are the same in number and arrangement, and in each case, the retainers and 15', which are alike in construction, alternate in arrangement around the carrier wheel. This arrangement of two alternating series, rows -or groups 0f containers 15-15 provides for a spacing of the containers to cooperate w1th two sets of can feeders and ejectors, whereby a simple, reliableand eicient can feeding and discharge action is obtained, and whereby, further, the machine is adapted to feed two sizes of cans or cans containing two different kinds of food products to be cooked. and to keep the same separate and discharge the same from separate outlets.-

Steam at any determined cooking temperature, and resultant pressure is supplied to the interior of the drum of the cooker A, from a suitable source, through a perforated heating coil 18, preferably located in the base portion of said drum. A suitable drain pipe or outlet 19 is provided for the .discharge of water 0f condensation, which may be allowed to rise to the maximum level line (Figure t) before discharge, which pipe may be suitably constructed and arranged for the discharge of the water, and a vent valve 19 is provided at the top of the drum for the discharge of air therefrom.

The front walls of the cooking and cooling drums are provided on opposite sides of the vertical centers of said drums with can feed inlets 20, and the rear walls of said drums are provided with can discharge outlets 2l, the respective inlets and outlets at each side of thel vertical center of the drums beingin alinement with each other. The. inlets and outlets 20-21 on the left hand side of the vertical centers of the drums are employed for the inlet of the cans to and their discharge from the can retainers 15, while the inlets and outlets 20-21 at the right hand side of the vertical centers of the drums are employed for the inlet 'of cans to and their discharge from the can retainers 15. Associated with each can feed inlet is a can feed device 22, and associated with each outlet is a can discharge device 23. Also associated with each inlet and outlet is a valve device, generally indicated at 24, serving also as a can injector or ejector, as the case may be, the valve devices between the drums A-A, and eX- tending between similarly arranged and alined inlet and outlet openings in the adjacent rear and front walls of the respective drums, serving also as combined ejectors and injectors for transferring the cans from one drum to the other. These feed and discharge devices, the structural features of which I will now proceed to describe, are driven in timed accord with each other and with the can carrier wheels in the drums through mechanism operated from a common source of driving power;

The feed and discharge devices 22 and 23. arranged in duplicate at each side of the machine forcoaction with the associated drum inlets and outlets, consist of fingers mounted upon shafts 25. Each shaft 25 is mounted for lateral oscillating as well as back and forth sliding or reciprocating movements. The shafts are coupled for rocking or oscillatory movements inwardly or outwardly in unison by connecting rods 26--27 and a centrally pivoted lever 28, to the reversely extending or opposite ends of which the rods are attached. Lever 28 carries a friction roller 2,9 which engages an annular cam groove in a rotary cam 30 mounted on a transverse transmission shaft 31 provided at the front of the machine. `The cam groove is provided with high: portions 32 and 33 and intervening low portions, the high portions operating successively on each revolution of the cam to rock--the` shafts in the proper directions to throw. the fingers into and out of can feeding and discharging positions. The can feed fingers are arranged atI the front ofthe machine in position to move into and out of the path of cans presented for introduction through the front injector valves, .while the can discharge fingers are arranged within the drums in position to be moved into and out of the path of the cans presented by the carrier wheels for delivery through the can outlets in the drums. When the fingers are brought by the inward rocking mo-vements of the shafts 25 in position to engage and impart feed motion'to cans, the shafts are moved rearwardly to cause the lingers to engage and move the cans rearwardly a prescribed distance, and when this movement is completed the shafts are moved forwardly backto normal position and then rocked outwardly to swing the iingers -backward to normal position, out of the line of travel of the succeeding cans approaching the drum inlets and outlets. The means for reciprocating or sliding the shafts 25 back and forth comprises a second cam 34 on shaft 31,-for transmitting back and forth rocking motion to arms 35 having yoked upper ends slidably and pivotally coupled to the shaft 25, said arms being united at their lower ends by a transverse rock shaft 36. Qne of said arms 35 carries Va friction roller 37 engaging groove 38 of .quadrantal form in the cam 34, said groove including portions 39 and 40 at different distances from the cam axis, whereby on each revolution Vof the cam the shafts will 'i `A`be slid rearwardly onltheir working mof vtion and then'slid forwardly -.or back to normal position'. @As shown in detail in v,Figure 21, eachrod 26--27 is indirectly l ioupled to the shaft 25 with which it connects by a crank arm 41, pivoted at its lower end to the rod and .carrying at its upper end a bearing sleeve 42. lSleeve 42 turns in a bearing opening 43 on a fixed part of the machine and receives the associated shaft "'25 which passes through it. The sleeve is longitudinally grooved to receive a spline or feather 44 set in the shaft, whereby the arm 41 is coupled to the shaft to transmit rockfing motions-thereto, while the shaft, may slide through it for reciprocating motions.

,1, Each-injectoror ejector valve device 24 comprises a casingA 45 having an inlet opening`464 at one `(-itslfouter) side and an outlet h o` enin 47 at itsdiametricall op osite (in- P g e Y P ner) side, Thisv casing'is also' provided at one or both sides with an attaching v plate 48. l

The devices 2 4 located at the front of coeker A serve as injectors which receive the cans from a source of supply and deliver the same to the inlet ends of the retainers 15--15 in the cooker drum. In this case the attaching plates 48 are fastened'to the front wall of the cooker drum and fit within the openings attaching plates 48 at each end, whereby theyV are fastened to the adjacent walls 4of said 4"2() to dispose the outlets of the injectors in line with the said openings. In the case ofdrums in line with the outlets 21 of the ,V

cooker drum and inlets 2O of the cooler drum, the cans being' received from the cooker drum into the intervening devices 24 through the openings 46 and delivered into the cooling drum through openings 47 The casing '45 has a circular body wall 49 forming a seat for a combined rotary valve and feeder 5() having a circular wall forming a valve member to engage the seat wall 49.

vExtending diametrically through the rotary" member 50 is a passage 51 sub-divided by` a partition 52 to form opposed chambers 53 and 54 alternately serving as receiving and discharging compartmentsvThe valve vmember 50 is periodically rotated a half revolution on each operation to bring the said compartments' 53 simultaneously and alternately into alinement with inlet and outlet openings 46 and 47 in the casing 45. Fitted in the passage 51is a reciprocating feeder proper, comprising plunger or piston heads 55 and 56 operating in the respective compartments 53 and 54 and connected for movement in unison by a rod 55', working through a suitable type of packing or stuif- ,ing box 57 in the partition 52, whereby leakage of steam through the partition between rotary valve member 50 is' provided withl journals 65 and 66 having bearing in the wallsl of the casing 45, and thel valve devices at the front lof the cooking drum, between the cooking and cooling vdrums and at the rear of the cooking drum are coupled in pairs for movement in unison by transverse shafts (37. Each of these transverse shafts 67 is provided at` one end with a mitre gear 68, and the mitre gears (3S of the several shafts 67 engage similar gears 69 on a longitudinally extending shaft 70, whereby all the shafts (S7, and the valves actuated thereby, are coupled for movement in unison in timed accord and at the same ratio of speed.

lBy reference to Figure 22 the operation of the combined valve device and feeder will be readily understood, this view showing a can 17 slidably entered endwise into the receiving chamber 53, in which .the piston head 55 is in retracted position, and another can 17 which has been slidably expelled endwise from the chamber 54 by out-- ward movement -of the projected piston 56. As shown, the chamber 54 is in communication with the inlet 47 of the cooking drum 1, and it will be apparent therefore that b v this operation, assuming a can retainer 15 yor 15 to `be in registry with the opening 47, the can 17 expelled by the piston 16 will be moved into said retainer. During this operation the piston member 56 will closetheI opening 47 against the loss of other than a very small amount of steam from the drum. When the valve member 50 is` given a half revolution in the direction of the arrow to its other working position, the positions of the compartments 58 and 54 will be reversed, a-nd steam will be admitted to the compartment 53 behind the piston 55 to move the same outwardly while the steam will exhaust from the compartment 54 to allow the piston 56 to move inwardly. By such half revolution of the member 50, the compartment 54 is brought into receiving position at .the opening 46 and the compartment 53 in discharging position at the opening 47, and the piston will thereupon expel the can previously admitted into the compartment 53 and will seal the opening 47 against the escape of any appreciable amount of steam from the drum. At all other times in the operation of the rot-ary valve member the circular' wall thereof will close the opening 45 against any but a slight escape of steam from the drum. It will be apparent, therefore, that in the operation of the apparatus the cans will be automatically fed into and discharged from the drums by devices which will, at the same time, and at all -other times, substantially seal the inlet and outlet openings in the drums against the escape of steam, whereby loss of any appreciable quantity of steam through passages, in the can feedingand discharging action, willk be prevented so that the temperature and pressure of the steam within the cooking drum, and the working pressure within the cooling drum` maybe maintained and kept practically uniform at all times in the operation of the apparatus. The injector and ejector valve devices operate in pairs, as described, to simultaneously introduce two cans at a time into retainers 15-15 presented at the inlets of the drum and to discharge two cans at a time from the same retainers through the outletsof the drum, the injector and ejector at one side of the vertical center of the machine operating to feed cans to and discharge cans fromrthe retainer 15, while the injector valves at the opposite side of the vertical center of the casing operate to feed cans` to and eject the cans from the other retainers 15, whereby certain advantages in the use and operation of the apparatus are obtained', as hereinafter described.

Mounted upon the forward end of the shaft 4 is a feed wheel 71 provided with an annular Vseries of peripheral teeth 72 and locking recesses 73 between the teeth. In the example shown, the wheel 71 isprovided with thirty teeth or notches 7:2 and an equal number of lockingrecesses 73, and the carrier wheel within each drum is provided with sixty can retainers 15 and1`5, equal to double the number of notches or tee-th 72 on the wheel 71. tently turned a distance of one tooth on each operation thereof, and is then locked in position until again turned, each movement of said wheel turning the carrier wheel a distance equalto the spaces between two can retainers, bringing a retainer 15 in line with the inlet and out-let openings at one side of the drum and a retainer 15 in line lwith the inlet and outlet openings at the opposite side of the drum, cans being fed by the oppositely arranged feediingers and feed valve devices simultaneously into the forward ends of said retainers and discharged from the opposite ends thereof, if any cans are in position for the discharging action. Intermittent motion is transmitted to the wheel 71 by means of a rotary feed dog 74 having a hub portion secured to a countershaft '75, said hub portion rbeing formed with a cut away part or recess 7 6 andI a circular part 77 concentric with the shaft 75. The shaft 75 carries a gear 78 meshing with a gear pinion 79 on a driveshaft 80 carrying a drive pulley 81 for receiving' driving motion from any power source. The shafy 75 is constantly driven by the shaft SO and once on each revolution of said shaft 75 the dog74 engages one of the teeth or notches 72 of the wheel 71 and moves the same a distance of one tooth, this operation being permitted by the cut away part 7G which clears the succeeding locking recess 73, the surface 77 then coming into engagement. with said succeeding recess 73 and seating therein to lock the wheel 71 against movement during the ren'iainder of the rotation ofI he dog 74, by means of The wheel 71 is intermit' drum, certain means being employed for shifting the cans transversely of the drum between the inlets and outlets, as hereinafter described, theshifting feed being fixed or variable, as desired, so as' to regulate the cooking period.

- On the countershaft 75 is a mitre gear 82u meshing with a mitre ear 83 on the 'shaft parted to said shaft 31v to actuate the cams 30 and y34.` The shafty 31 serves as a transmission shaft for actuating the lfingers 22-23, the shafts 25 by which the movements-of said fingers are controlled, and the valve members 50. carrying the reciproca-ting injectors and ejectors, at properly'timed intervals. 4Motion is communicated from shaft 31 to the elements 50 through a mutilated gear 84 having a toothed surface 85, extending substantially half aro-und its periphery and a plain or blank surface 86 eX- tending varound the Vremainder of its periphery. Gear84 is adapted for cooperation with another mutilated gear 87 mounted on the front transverse shaft 67, which gear '87 is provided with two substantially semi-circular seriesof peripheral teeth 88 .and 89 and vinterveningunto'othed and recessed locking portions.90`. Figure 9 shows in detail fthe construction of these gearsv 84 and 87,v

and shows 4 the toothed surface 85 about to engage the toothedsurface 88 after an interval of rest during which portion 86 of *gear84 has' been in engagement with Vone 1 of theportions 90 of .gear 87 thus holding the gear 87 stationary while the gear 84 has been makingan idle half'revolution. Dur'- ing this period of rest of gear 87 the valve members are maintained in fixed posig tion for the operation of the pistons and 56 at a time when .the carrier wheel is stationary, one piston vchamber being in position to receive af can 17 while another can is being discharged into a carrier wheel can retainer fromtheA other piston chamber. The gear surface 85 then comes into .mesh with lgear surface 88 and turns gear 87 `-a half revolution, thus reversing thepiston of the piston chambersf53` "and 54 of all the valve devices 50, `whereupon surface .86l of gear' 84 comes into. contact with the other sur-f face 90 of gear 87 and locks the valve de` vices in such position. The valve devices 50 are thus actuated once on'each complete rev- 31, whereby aconstant riving motion is'imtending around the olution of said gear 84, during which time A period the can feeding and discharge fingers 22 and 23 are operated and the carrier wheels turned a distance of one tooth. of wheel 71,'said parts being moved in timed relation vand the fingers 22 and 23 being actuated during the time periods of rest of the carrier wheel.

Arranged upon one side of each drum is a stationary can shifting device 91 having flanges 92 forming track rails spaced apart distances equal to the spaces between circumferential rows of cans in the retainers 15-15 von the carrier wheels. The shifter 91 o f each drum extends from front to rear of the drum across the periphery of the carrier wheel, and the` flanges o-r tracks 92 are inclined in the nature of spiral blades, hav- -the carrier wheel between the drum inlets and outlets at a fixed ratio determining the maximum cooking or cooling period, which may beY that necessary forA cooking the most. refractory food products at the highest steam pressure and temperature commonly employed. This fixed shifter may be used in cookers designed to have a fixed feed ratio andfixed cooking period, and such a shifter may be advantageously employed `alone for a can shifting action-in the cooling drum. I however provide iii the cooking drum l a can shifter having a variable can shifting action, which `shifter is shown in detail in Figures 28 to 3,2,if/qinclusive, and omitted from the remaining fi ures for greater clarity of illustration. his variable type of can shifter9/8 is inthe form of a sectional helical-l blade, rack or flange exint rior ofthe! cooking drum betweeiy/tli/e terminals/,ofr the ii'x'ed shifter 91, i(lig/'fons or sectionsofsaid helical shifter-,t l, s 'being disposed at different points in the ,path of feed of the cans from lfront to rear of the drum and across the peripheryl of @the carrier wheel. The' track 93 isnjfcoiiiposedl of any suitable number of sectil dis ed in an inoperative position and out of'tle'path of the outwardly projecting portions of the c`ai1s17, but are separately adportions of the cans'for transmitting shiftingfmotion tothe cans. Each track section sor divisions 94 which are normally -justable inwardly to engage the projecting I' as to properlysupport and guide said trackl sections in thelr movements. The web 9G of each'track section is pivotally coupled, as at 98. by a` slot/and pin connection, with an adjustingdevice comprising a. radially mov able rod 01./ plunger 99 fitted for sliding movements in a casing 100 extending outwardly through an opening in the drum shell and suitably secured thereto, said plunger 99 being adjustable inwardly and outwardly b-y a hand wheel 101 having a threaded engagement with the casing 10() as at 10:2., by mea-ns of which the track section 94 may be moved forwardly and backwardly .between normal or retracted and working positions. Any other suitable adjusting means for the track sections may, however. be employed. rl`he casing 100 is provided with a suitable stufiing box or packing 103 to prevent leakage of pressure therethrough from the drum. By means of these adjusting devices anyone,or any number or all of the track sections 94 may be adjusted inwardly to'working positions to engage the portions of the cans projecting from the retainers ifi-. By projecting 'one of the tracks 94 for cooperation with the fixed shifter 9L these Shifters will jointly operate in the revolution of the carrier wheel to shift the 'ans toward the outlet, thus giving the cans a faster rate of feed motion and correspondingly reducing the time period of the cook without diverging the cans from one retainer to another or varying the normal course of travel of said cans. By adjusting two or more of the track sections 94 inwardly, the rate of travel of the cans teward the outlets will be correspondingly' increased, vin proportion to the number of track sections 94 used, thus enabling the time period of travel of the cans between the inlets and outlets to be varied as desired and the cooking period to be correspondingly varied. By proper setting of the shifting devices, therefore, the operation of the cooker may be accurately and definitely controlled for any cooking time period between that required for cooking the most easily cooked food products and. that required for ooking the most refractory food products,

anda proper adjustment of the helical track sections will set the cooker for any time periol of cook, in which the operation will be automatic from start to finish, without re-y quiring the attention. of the operator. Of cpurse, the amount yand temperature of steam supplied to the cooker will be such as that required for cooking any .food stuff within a determined period, and in practice the feed of steam may be either manually or automatically controlled.

Any suitable coolingrmeansmay be employed for cooling the cans lbeing conveyed around and, through cooler drum A.' in the present instance l have shown va water fil sprayer varranged to arch over the carrier wheel and -comprising perforated spray pipes 10sL connected with a header 105 communicating with a valved water supply pipel 10G. Cooling water, at a suitable low temperature, may thereby be supplied to flow down over the cans and abstract the heat therefrom. The `water fiowing down over the cans may be allowedl to collect in the form of a pool in the bottom of the drum A up to .the level of the overfiow pipe 107, which is below the level of the inlets and outlets -21. The lower portion of the carrier wheel passing through this pool causes the cans carried thereby to be temporarily submerged on their travelthrough the pool, thus increasing' the efficiency of the cooling action. A valved air supply pipe 108 is provided whereby compressed ai'r, at any required pressure, may be supplied to the in'- terior of drum A to keep the pressure on the interior of the drum approximately equal to the pressure on the interior of the cans being cooled, thereby preventing the cans from bulging or bursting.

In the operation of the apparatus, the cans, previously filled and sealed with the food stuff to be cooked, are fed or supplied in any suitable manner for admission through the feeders at the front of the cooking drum. The receiving compartments of the valved feeders 24 at the front of the cooker being in position to receive cans, at the outset of the operation the grooved portion 3Q of cam 30 operates to cause the feed fingers E22 to bc moved inwardly behind the cans presented for admission to the valved feeders. In such position of the parts, shafts Q5 are in their forward position. Grooved port-ion 39 of cam 34 then operates to slide the shafts 25 rearwardly, thus causing the fingers 2Q to slidably feed the cans endwise as presented into the receiving compartments `of the valved feeders 24. After this operation is completed, groove portions 33 and 40 of the respective cams and 34 come into action in timed accord to swing the fingers 22 backwardly to retracted position and to slide the shafts 25 forwardly, thus resetting the fingers 22 and cooperating parts for the succeeding feed action. Gear, 84 has by this time turned to bring its toothed portion 85 into engagement with toothed portion 88 of gear 87, thereby imparting a half revolution to shaft G7, at the end Lof which surface 86 comes into engagement with the proper recess 90 to lock gear 87 against further rotation. Through this half revolution of sha-ft 67,

valve member is given a half revolution to bring the receiving compartment, as the compartment 53 therein, into registry with the opening 47, while the other compartment 54 is reversed as to position and moved to the receiving position previously occupied by compartment The sets of feed devices at opposite sides of the front of the cooking drum are simultaneously operated in the manner described, during which time the can carrier wheel in the cooker remains at rest` one can retainer of the series and one can retainer of the series'15l being held in registry with the openings 47 of the valve .feeders to receive cans from the compartments 53 thereby brought into delivery position. Movement of cam member 50 to the position described, rauses port 64 associated with feed piston to be brought into registry with exhaust outlet (3() and port 63 associated with piston 5G to be brought into registry with the steam feed port 59, whereby steam. will be supplied to the compartment 541 behind the piston 56 to 'move said piston to discharge position. Pistons 56 of the two valved feeders thus slidably move the cans from Acompartments 54 into the re ceiving retainers 15 and 15', valves 5G dur-` ing such operation closing ports L17 against the escape of steam. Movement of compartment 53 inwardly7 to discharging position causes compartments 54 to be moved outwardly to receiving position for the setting of the valve feeders for actuation in the next cycle of operation under engagement of toothed surface of gear 84 with toothed surface 89'of gear 87. The feed dog 74 then comes into operation to move the feed wheel 71 a distance of one tooth, said feed wheel then being locked against movement until again turned by the dog in the manner previously described. Movement of one tooth of the wheel 71 causes carrier wheel 5 to be moved a distance equal to the distance between two transverse rows of can retainers thereon, as a result of which a, retainer 15 will be presented to receive a can from the valve feeder 24 at one side of the cooker drum while a retainer 15 will be presented to receive a can from the valve feeder at the opposite side of the cooker drum, retainers 15 skipping one valve feeder and retainers `15 the other valve feeder in the turning motion of the carrier wheel 1n the mannerl described, as will be readily understood. Carrier wheel 5 is then held fixed until again actuated b v the movement of wheel 71, during which period the feeders operate in Athe manner previously described. On each intermittent movement of the carrier wheel 5, the fixed shifter 91 comes into operation to shift the cans 17 held in the retainers a distance of one circumferential row toward the outlet end of the drum, thus progressively moving the cans toward the outlets 21. When cans on the wheel 5 reach a position for discharge through the outlets 21. the fingers F23 operate during the feed motion of fingers 22 to 'force cans in position for discharge through openings 21 into the receiving compartments of valve feeders 24 be` tween the two drums, which act thereafter' to feed the cans into the retainers of the carrier wheel 5 in the cooling drum A', the fixed shifter 91` in said d'rum A feeding the cans toward the outlets of said drum, the cans being discharged through the outlets of the drum by the set of fingers 23 therein into the valve feeders 21 at the rear of said drum, from which they are finally discharged onto conveyors or into suitable receptacles. The cooler A may and preferably will have a fixed cooling period, so that a fixed shifter 91 may be employed therein. and a` fixed shifter 91 alone may be used in the cooker drum A in the event that said drum is designed and used only for cooking certain food stuffs requiringa fixed and invariable cooking period. ly the lise of the helical variable feeder. however, the ratioof feed of the cans between inlets and outlets of the cooker drum may be varied as desired, for long, s'hort or medium time cooks, or cooks of any given period. thus enabling all kinds of food stuffs to be cooked in one and the same cooker within minimum and maximum pressure cooking ranges. whereby the cooker is adapted for general use in the cooking of all kinds of. food stuffs falling within the cooking range of both the' continuous agitating cooker heretofore employed and the retort cooker. without any change except a supply of the steam at the proper temperature and pressure and the adjustment of the sections of the variable helical feeder to regulate the time period of travel of the cans which governs the cooking time. The operation of this variable helical can shifter has been previously describeihso that a further description thereof is unnecessary. The operation of the cooler will also be fully and clearly understood from the foregoing description.

It will, of course` be understood that food stuff contained in the cans is properly agitated to facilitate the cooking action inthe movements of the cans with and around the carrier wheel and across the periphery of said wheel.

It will accordingly be seen that my Ainvention provides a cooker which is adapted fOr cooking all kinds of food stuffs.y at any predetermined steam pressure and temperature, inasmuch as the cooker is at all timessealed against the loss of any appreciable amount of steam pressure and temperature, and hence the temperature and pressure may be maintained at accurate working degrees, and for the further reason that the ratio of travel of the cans between the inlets and outlets may be regulated 0r varied to suit the time period of the cook. By reason of the reliable and efficient reduction of steam temperature and pressure,the cooker may be made quite short and compact, and the variable shifting action described is permitted because of the resulting comparatively short Laage-ie cost of construction and installation and ensures reliability and etliciency in the cooking action and economy in the use of steam, as well as in all other factors relative to operation and maintenance of the apparatus in good Working condition. The apparatus, being adapted for general use, takes the place and performs all the combined functions of an ordinary continuous agitating pressure cooker anda retort cooker. saves large amount to the canner in the installation andjniaintenance of machinery and enables the canner, through the use of asingle set of apparatus, to operateat all seasons and -on all classes of goods. It will be observed that, in all the described operations of handlingr the cans, 'the cans are slidably moved endwise or'lengthwise through the inlet and outlet openings and into and along the retainers by means of the various feeders; also that the cans a're yieldingly held in the resilient retainers which are free toaccommodate themselves to any protuberances or irregularitiesl of surfaces which may occur, as in the case of dented or misshaped cans. The sliding feed motion of the cans referred to` in contradistinction to a rolling motion, prevents any choking or binding of the cans at any point. which is liable to' occur, particularly in the case of misshapen cans, when a rolling feed motion is employed. A smoothness of action, Withv freedom from liability of the cans binding or clogging, is thus secured, which is' promoted by the resilient construction of the retainers, which will allow evenv a badly nrisshapen can to Without interference and Without liability of binding. Furthermore, the sliding motion of the cans ensures less liability i of 'possible damage Ato .the cans in transit through endivise pressure applied thereto than a.y rolling motion in which endyvise pressure is applied thereto, on account of the greater strength of the end portions or heads of the cans. This provision for ensuring easy feed motion of the cans, and

avoidance of the liability of the cans choking in the carriers is important, as any 'jam- .ming of the cans in the carriers to an extent sufficient to stop the feed motion of the cans would require stoppage" of the apparatus and its disassemblage in order to remove the cans and break the iam, ata cost of the lossv of considerable time and labor and a decrease in production on account of the shutting down of the apparatus. These and other advantages arising` from my invention vvill be readily understood, Without a further and extended description, by those versed in the art. v

While I have herein set forth the use of steam as the .heating Huid for the pressure cooking action in the heating drum it is to be understood that the invention is not limited thereto, as any equivalent heating fluid, such as air or gas, may be used in lieu theerof.

Having thus fully described my invention, l claim-: Y

l. In an apparatus of the character described, a drinn having inlets and outlets, a rotary can carrier in said drum provided with an annular series of transverse peripheral can retainers adapted .for registry With said inlets and outletsat points in the rotation of the carrier, each retainer comprising a channeled body having relatively movable side Walls adapted to yieldingly enga-ge and hold the cans therein. and means for rotatingsaid carrier;

2. In an apparatus of the character described. a drum having can inlet and outlet openings in opposed walls thereof. a rotary carrier in said drum provided with an annular series of can retainers extending trans versely of the periphery thereof and adapted for registry \vith said inlets and outlets at points in the rotation of the carrier, each of said can retainers comprising a channeled body of partially circular form in cross-sec tion and adapted to slidably receive and eX- tend sufficiently around the body of a can to hold' the same therein, said retainer having relatively yielding resilient side walls, and

means for imparting rotary motion to thev carrier.

3.111 an apparatus of the character described. the'combinatlon ot' a vertically disposed drum having an inlet in'its front wall and an outlet in its rear Wall, valves controlling said inlet and outlet, a horizontally disposed shaft journaled in said Walls of the drum, a rotary carrier mounted on said shaft, an annular series of fixed transverse can holding channels on the periphery of the carrier adapted to be brought by the rotation thereof into registry with said openings, said channels being adapted to embracennd slidably hold the cans therein. a feed wheel upon said shaft, means for intermittently turning saidv Wheel and locking the same against rotation between intervals of operation, means for opening' and closing the valves of the inlet and outlet at timed intervals. injector means for slidably inserting cans through the inlet opening and its valve into the channels, means for slidably ejecting the cans from the channels through said outlet opening and its valve, and means for operating said injectors and ejectors in timed relation to the movements of the valves.

el. In an apparatus of the character described` a drum having vertically disposed front and rear Walls` said lfront Wall being provided with inlet openings on 'opposite sides of its vertical center and said rear Wall having correspondingly arranged outlet vin the drum and mounted on said shaft, an

annular series ot altcrnatelv arranged channels extending transversely of the periphery of the drum and adapted to respectively register .with said inlets and outlets at points in the path of revolution of the drum, gearing for intermittentlyY turning the carrier a distance equalto the distance between two transversely disposed can retainers on each movement thereof and for locking said carrier between intervals of operation, separate and independent feed devices for slidably injecting cans endwise through the inlet openings into the can retainers, sets of separate and independent ejector devices for slidaloly ejecting the cans from the retainers through the outlet openings. and means for operating the said feed wheel and injectors and ejectors' in timed accord.

5. ln an apparatus of the character described, a drum having inlets and outlets, a rotary carrier wheel in said drum, 'an retaineis on the carrier wheel adapted to register with said inlets and outlets and to slidably receive cans fed therein, independent reciprocatory feed devices respectively associated with the inlets and outlets for respectively injecting cans through the inlet into the retainers and discharging cans from the retainers through the outlet, and means for conjointly operating said independent reciprocatory feed devices.

6. In an apparatus of the character described, a drum having` inlets and outlets a -rotary carrier wheel in said druin, 'an 'retainers on the cari'iei wheel adapted to register with said inlets and outlets, can feeding and discharging means including coinbined oscillatory and reciproeatory feedersrespectively associated with the inlet and outlet, and means for conjointly operating said oscillatory and i'eciprocatory feedeis.

7. In an apparatus of the character described, a drum having inlets and outlets, a rotary carrier wheel in the drum, can retainers on the carrier wheel adapted to register with said inlets and outlets, valves controlling said inlets and outlets, reciprocatory feeders associated with saidvalves, combined oscillatory and reciprocatory feeders movable laterally into and out of alineineiit With and toward and from the valved inlets and outlets, and means for operating the valves, reeiprocatory feeders and combined oscillatory and reciprocatory feeders in` timed accord,l

8. 1n an apparatus of the character de.- scribed, the combination of a drum having a plurality of Sets of cooperating can inlets and can out-lets, means for supplying uid pressure to said drum, a rotary carrier within the drinn, can retainers upon the carrier 'arranged for cooperation With the inlets and in the rotation of the carrier, and means` within the drum for shifting cans along the retainers to 'ard the outlets.

9.1In an apparatus of the character described, a drum having a plurality of sets of separate can inlets and outlets, means for supplying fluid pressure to the drum. an intermittently operable rotary carrier within the drum' having sets of transverse retainers across the periphery thereof arranged for cooperation with the separate sets of inlets and outlets` means for intermittenti)1 rotating the carrier to bring the sets of retainers into respective alinement with their coacting inlets and outlets, means for introducing cans through the inlets and discharging cans through the outlets, and means for shifting cans along the retainers toward the outlets in the rotation of the carrier.

l0. In an apparatus of the character described. the combination of a drum having two sets of coacting'inlets and outlets, means for supplying Huid pressure to said drum, an intermittently operable rotating carrier within the drum, two sets of alternating can retainers upon the drum for cooperation respectively with the sets of inlets vand outlets, means for intermittently rotating the drum so as to cause the retainers cooperating with one set of inlets andoutlets to register' there# with and to skip the other inletiand outlet, means for feeding cans through the. Ainlets into the containers registering therewith and openings, and means for oscillatingand lieciprocating said devices.

l2. ln an apparatus of the character described, a drum having vertically disposed front and rear walls provided on opposite sides of their vertical centers respectively with registering` inlet and outlet openings, a rotary carrier within the di um, an annular series of tivo sets of transversely arranged and alternating can holding guides mounted on the periphery of the carrier and adapted to respectively register with the sets of inlet and outletopenings at points in the revolution of the carrier, valves controlling said openings, injectors and ejectors associated with the valves ofthe inlet and outlet openings, and feed and discharge devices for each set of openings mounted toI oscillate back and forth relative to said openings and to reciprocate with respectto said openings, and means for conjointly operating the carrier, valves, injectors and ejectors and feed v devices in timed accord.

13. In an apparatus ofthe character described, a drum having front and rear vertilfeeders in said valves for shifting cans from the respective valve-compartments through the drum openings, oscillatory and reciprocatory shafts, and feeders carried by said shafts and movable by the "oscillatory movements of the shafts into and out of line with the valve compartments and operative in one direction of reciprocatory x movement thereof t0 slide cans into thefregistering valve compartments, and means for operating the Working parts in timed accord.

14. In an apparatus of the character described, the combination of a drum having can inlets and outlets, means for supplying fluid pressure t0 the drum, an intermittently movable rotary carrier within the drum, can retainers upon the carrier adapted to register with the can inlets and outlets, reciprocatory feeders for introducing cans through the inletsv` and reciprocatory feeders for discharging the cans through the outlets, means independent of said feeders for shifting the cans across the carrier'and toward the outlets, rotary valves for sealing the inlets and outlets between intervals of operation of the feeders and atall times thereafter, and means for intermittently rotating the carrier and conjointly reciprocating the respective feeders and rotating the valves in timed accord.

l5. In an apparatus of the character described, a drum having at least two sets of separate and independent can inlets and outlets, means for supplying a treatment fluid to said drum, a carrier Within the drum for conveying the cans through a course of treatment, said carrier having can holders for cooperation With the separate and independent sets of inlets and outlets, means for slidably introducing cans endwise through the inlets sliding the same endvvise in the l thereto, means Within the drum for conveying the cans through a prescribed course for cooking treatment, separate and independent feeders for introducing separate sets of cans'into the drum at diferent points for movement through said course and for maintaining said separate sets of cans segregated through-such course, and separate and independent injectors for discharging the sets of cans from the drum at different points andin separate relationship at the completion of the cookingvoperation.

17. Inan apparatus of the character described, the combination of a cooking drum having separate and independent inlet openings in its front Wall on opposite sides of its vertical center and having separate and independent discharge openings in its rear Wall similarly arranged for coaction Witli the corresponding inlet openings in the front Wall, a rotary carrier in said drum, sets of retainers upon the carrier arranged in alternation for cooperation with the respective sets of inlets and outlets, separate and independent feeders for introducing cans through the said separate and independent inlets into the retainers, means for shifting the cans along said retainers toward the outlets, separate and independent discharge devices for discharging the? cans through said separate and independent discharge openings, and-means for intermittently operating 'the carrier to bring the retainers into alinement With'their coacting inlets and outlets and operating the feeding and discharge means in timed accord therewith.

18; In an apparatus of the character described, the combination of a cooking drum, a cooling drum, said drums being arranged one in ,advance of the other and in different parallel vertical planes and having can inlets and outlets, a valved passage directly connect-- ing the can outlet of the cooking drum with thecan inlet of the cooling drum, coaxially mounted rotary carriers in said drums, similarly disposed can retainers-upon the car- *riers so arranged that corresponding retainers on the carriers are adapted to simultaneously register with the inlets and outlets in the drums, means for introducing cans through the inlets of thefcooking drum llti 

